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Wed, 1 Sep 2021 01:05:32 -0400 (EDT) From: Samuel Holland To: Maxime Ripard , Chen-Yu Tsai , Jernej Skrabec , Michael Turquette , Stephen Boyd Cc: linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, Samuel Holland Subject: [PATCH 3/8] clk: sunxi-ng: Use a separate lock for each CCU instance Date: Wed, 1 Sep 2021 00:05:21 -0500 Message-Id: <20210901050526.45673-4-samuel@sholland.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210901050526.45673-1-samuel@sholland.org> References: <20210901050526.45673-1-samuel@sholland.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210831_220536_873394_92DC0BC4 X-CRM114-Status: GOOD ( 13.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Some platforms have more than one CCU driver loaded: the main CCU, the PRCM, the display engine, and possibly others. All of these hardware blocks have separate MMIO spaces, so there is no need to synchronize between them. Signed-off-by: Samuel Holland --- drivers/clk/sunxi-ng/ccu_common.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/clk/sunxi-ng/ccu_common.c b/drivers/clk/sunxi-ng/ccu_common.c index 88cb569e5835..31af8b6b5286 100644 --- a/drivers/clk/sunxi-ng/ccu_common.c +++ b/drivers/clk/sunxi-ng/ccu_common.c @@ -17,11 +17,10 @@ struct sunxi_ccu { const struct sunxi_ccu_desc *desc; + spinlock_t lock; struct ccu_reset reset; }; -static DEFINE_SPINLOCK(ccu_lock); - void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock) { void __iomem *addr; @@ -94,6 +93,8 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, struct device *dev, ccu->desc = desc; + spin_lock_init(&ccu->lock); + for (i = 0; i < desc->num_ccu_clks; i++) { struct ccu_common *cclk = desc->ccu_clks[i]; @@ -101,7 +102,7 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, struct device *dev, continue; cclk->base = reg; - cclk->lock = &ccu_lock; + cclk->lock = &ccu->lock; } for (i = 0; i < desc->hw_clks->num ; i++) { @@ -133,7 +134,7 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, struct device *dev, reset->rcdev.owner = dev ? dev->driver->owner : THIS_MODULE; reset->rcdev.nr_resets = desc->num_resets; reset->base = reg; - reset->lock = &ccu_lock; + reset->lock = &ccu->lock; reset->reset_map = desc->resets; ret = reset_controller_register(&reset->rcdev); -- 2.31.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel